Gun sights paint purchase options

This is a discussion on Gun sights paint purchase options within the Glow-On forums, part of the Site Sponsors category; Here is a schematic showing the most popular purchase options for paint and self adhesive material.
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Glow-On gun sights paint purchase options real size

In the diagram below we attempt to show the real life size of some presentations of Glow-On Super Phosphorescent.
sometimes it seems that the better option is to buy larger size vials because one gets more bang for the buck. However it can be an overkill if we don't have use for the paint and after a year or so when we open the small vial the paint has seized and dried ( which is what paint does).

The diagram has been corrected ( the diagram on previous posts the self adhesive was out of proportion), if right click on the photo and choose "view image" to see it in real size.

How do I know if I have applied enough paint to my gun sights?

How do I know if I have applied enough paint to my gun sights? Is there a chart somewhere to check if I have done the best that can be done with the product?

On top of every vial of Glow-On there is a small dot made with the same material inside the vial. One can check immediately the properties of Glow-On upon the products arrival.
This dot is a good point of reference to compare our gun sights job, if the result is not the same, we might need to apply a bit more, etc, etc. Factors like thickness of the application and drying time are important assessing the afterglow.

With the self adhesive it's a lot simpler, its a single layer and it can be applied only as a single layer